Interesting. Soft in comparison. . . so it's all relative then. This god does not have to actually be good----it only needs to be a bit better. The lesser of many evils? Okay. The people of Mesopatamia were conditioned to serve brutal gods. They resided between the Tigris and Euphrates, two unforgiving and unpredictable rivers. Naturally their gods were both life givers and killers--like their rivers. The Nile on the other hand was a gentle and predictiable river. There is no sound evidence that human sacrifice was practiced in Egypt. There are hypotheses, but it is generally accepted that this was not a part of the religion.
All of this makes sense because religion is regional. The Jewish god grew out of the Mesopatamian religion, and the Law of Moses grew out of the Law Code of Hammurabi. We really should expect a particularly violent god to emerge from these people. Why was he slightly softer? Perhaps that 400 years the Jews spent in Egypt injected some ideas. And it should be noted, that while many cultures did practice human sacrifice, many did not. So it's not even as though this was an original thought---although the Christian god did practice human sacrifice.
Now we understand the people of the day. We understand their morality and what it was based on. Brutal environments produce brutal gods, and brutal gods produce brutal people. As interesting as that is, it's not really the issue.
When people were at the whim of their environment with little understanding of how natural phenomena worked, they created their answers. It gave them a sense of control. Appease this god, and maybe we won't have drought or flooding. But what about today? Knowledge is all around us. Information pours from our computer. We don't need to burn witches anymore, because we understand bacteria and have found the real cause of plague.
So we should excuse ancient people for practices that appear quite brutal to us today. They processed the world the only way they knew how. Many of the choices they made were quite logical, given their knowledge. But what about today? Why do people continue to embrace a violent god that practices human sacrifice? Most would agree that human sacrifice, genocide, witch burning are wrong, but they cling to a god that grew out of a culture where these things were par for the course.
And so back to the OP----it's cognitive dissonance.